Spelling suggestions: "subject:"artibeus latirostris"" "subject:"artibeus longirostris""
1 |
Análise da variabilidade morfométrica de morcegos em habitats fragmentadosMEDEIROS FILHO, Sérgio Almeida de 27 February 2015 (has links)
Submitted by Mario BC (mario@bc.ufrpe.br) on 2016-06-10T12:26:32Z
No. of bitstreams: 1
Sergio Almeida de Medeiros Filho.pdf: 1135629 bytes, checksum: 2d9c68b6638c763cec59e0543587e5ad (MD5) / Made available in DSpace on 2016-06-10T12:26:32Z (GMT). No. of bitstreams: 1
Sergio Almeida de Medeiros Filho.pdf: 1135629 bytes, checksum: 2d9c68b6638c763cec59e0543587e5ad (MD5)
Previous issue date: 2015-02-27 / One of the most environmentally impacted Brazilian biomes is the Atlantic Forest, mainly due to the exploitation of natural resources since the time of the discovery of Brazil. Currently, only about 5% of the original coverage of this biome is preserved and distributed in fragmented habitats involved by urban areas. As one of the groups that have a great potential to be indicators of the habitat destruction levels in many regions of the world, bats has a great importance for the maintenance and restoration of these ecosystems, since they are, among many other functions, excellent seed dispersers. Hence, researches that aim to increase the knowledge about these animals, manly in impacted environments need to be conducted. In this context, this study aimed to evaluate the possible effects of the fragmetation of the Atlantic Forest in the external morphological features of these mammals. Were measured 12 morphometric variables and the weight of 136 individuals of the Atibeus planirostris, collected in Ecological Reserves of Caetés, Tapacurá Ecological and Charles Darwin. The results obtained using univariate and multivariate analyzes indicatedifferences in bat forearm length of A. planirostris between the ecological stations studied, possibly due to resource constraints and other factors that act on the Atlantic forest fragments. / A Floresta Atlântica é um dos biomas que mais sofreram impactos ambientais devido à exploração de recursos naturais desde a época do descobrimento do Brasil. Atualmente, somente cerca de 5% da cobertura original deste bioma está preservada, e distribuída em fragmentos de habitats envolvidos pela malha urbana. Como um dos grupos com grande potencial de serem indicadores sobre os níveis de destruição de habitats em muitas regiões do mundo, os morcegos são de grande importância para a manutenção e recuperação de ecossistemas, devido, entre muitas outras funções, serem excelentes dispersores de sementes. O objetivo do presente trabalho é avaliar quais os possíveis efeitos que a destruição da Floresta Atlântica vem causando nas caraterísticas morfológicas externas destes mamíferos. Foram mensurados 12 variáveis morfométricas e o peso de 136 indivíduos da espécie Artibeus planirostris, coletados nas Reservas Ecológicas de Caetés e Tapacurá, e o Refugio Ecológico Charles Darwin. Os resultados obtidos através de analises univariada e multivariadas, indicam diferenças no comprimento do antebraço de morcegos da espécie A. planirostris entre as estações ecológicas estudadas, possivelmente devido a limitações de recursos e outros fatores que agem sobre fragmentos de floresta atlântica.
|
2 |
Citoarquitetura e imunoistoqu?mica para tirosinahidroxilase dos n?cleos dopamin?rgicos mesencef?licos do morcego (Artibeus planirostris)Medeiros, Helder Henrique Alves de 26 June 2015 (has links)
Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-04-16T00:08:09Z
No. of bitstreams: 1
HelderHenriqueAlvesDeMedeiros_DISSERT.pdf: 5892652 bytes, checksum: 483b84205306ccbbdee7acffe7f76a61 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-04-22T20:12:17Z (GMT) No. of bitstreams: 1
HelderHenriqueAlvesDeMedeiros_DISSERT.pdf: 5892652 bytes, checksum: 483b84205306ccbbdee7acffe7f76a61 (MD5) / Made available in DSpace on 2016-04-22T20:12:17Z (GMT). No. of bitstreams: 1
HelderHenriqueAlvesDeMedeiros_DISSERT.pdf: 5892652 bytes, checksum: 483b84205306ccbbdee7acffe7f76a61 (MD5)
Previous issue date: 2015-06-26 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / A 3-Hidroxitiramina/Dopamina (DA) ? uma monoamina do grupo dascatecolaminas e consiste na subst?ncia precursora da s?ntese de noradrenalina eadrenalina, tendo a enzima Tirosina-Hidroxilase (TH) como reguladora desse processo.Al?m disso, a DA tem a capacidade de atuar como neurotransmissor no SistemaNervoso Central - SNC, sendo o neurotransmissor principal de neur?nios de noven?cleos encef?licos, nomeados de A8 ao A16. Os n?cleos do mesenc?falo queexpressam DA s?o a Zona Retrorubral (RRF, grupo A8), a Subst?ncia Negra parscompacta (SNc, grupo A9) e a ?rea Tegmental Ventral (VTA, grupo A10). Tais n?cleosest?o envolvidos em tr?s complexas circuitarias que s?o a mesoestriatal, mesol?mbica emesocortical, os quais est?o relacionadas diretamente com diversas manifesta??escomportamentais como controle da motricidade, sinaliza??o de recompensa naaprendizagem comportamental, motiva??o e nas manifesta??es patol?gicas da Doen?ade Parkinson e esquizofrenia. Todavia, muitos aspectos de car?ter morfofuncionaldesses n?cleos ainda continuam sem esclarecimentos. Considerando a relev?ncia dosn?cleos dopamin?rgicos mesencef?licos, o objetivo deste trabalho ? caracterizarmorfologicamente os n?cleos dopamin?rgicos (grupamentos A8, A9 e A10) domesenc?falo do morcego (Artibeus planirostris). O Artibeus planirostris ? um morcegocomum no Rio Grande do Norte. Foram utilizados dez animais nesta pesquisa. Osanimais foram anestesiados, perfundidos e os enc?falos removidos da cavidadecraniana. Ap?s desidrata??o em sacarose, os enc?falos foram submetidos a microtomiae sec??es coronais foram obtidas e coletadas em seis compartimentos distintos. Oscompartimentos foram submetidos a colora??o pela t?cnica de Nissl para an?lisecitoarquitet?nica e as demais s?ries foram submetidas a imunoistoqu?mica para TH.Com base na t?cnica de Nissl e na imunoistoqu?mica para TH foi poss?vel verificar oslimites anat?micos, assim como a citoarquitetura e poss?veis subdivis?es dos tr?sn?cleos dopamin?rgicos do mesenc?falo. No sentido rostro-caudal, os primeirosneur?nios dopamin?rgicos a surgirem fazem parte da SNc e se estendem at? n?veis maiscaudais do mesenc?falo. A VTA surge nas sec??es rostrais e continua at? o n?vel caudal.No n?vel caudal surge a RRF. A SNc apresentou a exist?ncia de uma subdivis?o, acauda da subst?ncia negra, encontrada em apenas dois outros animais estudados. Opresente estudo indica que os n?cleos dopamin?rgicos do mesenc?falo do Artibeusplanirostris apresenta semelhan?as citoarquitet?nicas, bem como no padr?o dedistribui??o de neur?nios imunorreativos a Tirosina Hidroxilase em compara??o a10 outras esp?cies de mam?feros estudados, com pequenas varia??es, identificada nasubst?ncia negra. / The 3-Hidroxytyramine/dopamine (DA) is a monoamine of catecholamine family and isthe precursor substance synthesis of noradrenaline and adrenaline, having the enzymeTyrosine Hydroxylase (TH) as this regulatory process. In addition, the DA has theability to act as a neurotransmitter in the Central Nervous System - SNC, being themain neurotransmitter of brain nuclei, namely of A8 to A16. The nuclei of the midbrainthat express DA are the Retrorubral Field (RRF, A8), the Substantia Nigra parsCompacta (SNc, A9) and the Ventral Tegmental Area (VTA, A10). Such nuclei areinvolved in complex three circuitry that are the mesostriatal, mesolimbic andmesocotical and are directly related with several behavioral manifestations as motricitycontrol, reward signaling in behavioral learning, motivation and pathologicalconditions, such as Parkinson's Disease and schizophrenia. Interestingly, many of themorphological bases of these neural disturbance remain unknown. Considering therelevance of mesencephalic dopaminergic nuclei, the aim of this research is tocharacterize morphologically the dopaminergic nuclei (clusters A8, A9 and A10) of themidbrain of the bat (Artibeus planirostris). The Artibeus planirostris is a common bat inRio Grande do Norte. Ten animals were used in this research. The animals wereanesthetized, perfused, and the brain was removed from the skull. After dehydration insucrose, the brain was underwent microtomy. Saggital and coronal sections wereobtained and collected in six separate series. The series were Nissl-stained to identifythe cytoarchitectonic boundaries and the other series were subjected toimmunohistochemistry for TH. After cytoarchitectonic analysis and TH+ cellsidentification was possible to establish the anatomical boundaries of the nuclei, as wellas the subdivisions of three of the midbrain dopaminergic nuclei. The SNc is the mostrostral nucleus observed in the midbrain and is identified throughout the rostrocaudalextension of the midbrain. The VTA neurons were seen immediately caudal to the SNcappearance. The RRF neurons were observed just in the caudal levels of the midbrain.The SNc in Artibeus planirostris shows a particular feature, the tail of the SNc. The tailhave been described just in two other studied species. The present work shows aparticular variation in the organizational morphology of the SNc in the artibeus andcontribute to understand the phylogenetic routes by which the dopaminergic system hasevolved.
|
3 |
Organiza??o nuclear do sistema seroton?rgico no enc?falo de morcegos Artibeus planirostrisLeite, Mariana Dias 09 July 2015 (has links)
Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-04-25T23:08:59Z
No. of bitstreams: 1
MarianaDiasLeite_DISSERT.pdf: 3236887 bytes, checksum: de54a5e9a05ca367ece5cdde2f640a5c (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-04-28T00:04:20Z (GMT) No. of bitstreams: 1
MarianaDiasLeite_DISSERT.pdf: 3236887 bytes, checksum: de54a5e9a05ca367ece5cdde2f640a5c (MD5) / Made available in DSpace on 2016-04-28T00:04:20Z (GMT). No. of bitstreams: 1
MarianaDiasLeite_DISSERT.pdf: 3236887 bytes, checksum: de54a5e9a05ca367ece5cdde2f640a5c (MD5)
Previous issue date: 2015-07-09 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / A serotonina ou 5-hidroxitriptamina (5-HT) ? uma subst?ncia encontrada em muitos
tecidos do organismo, inclusive no sistema nervoso atuando como neurotransmissor.
Dentro do neuro-eixo, a localiza??o da maioria dos neur?nios 5-HT se sobrep?e com os
n?cleos da rafe do tronco encef?lico, na linha m?dia ou em suas proximidades, de tal
maneira que a 5-HT neuronal pode ser considerada um marcador dos n?cleos da rafe.
Os neur?nios seroton?rgicos projetam-se para praticamente todas as ?reas do
enc?falo. Estudos mostram a participa??o da serotonina na regula??o da temperatura,
comportamento alimentar, comportamento sexual, ritmos biol?gicos, sono, fun??o
locomotora, aprendizagem, entre outras. A anatomia destes grupos foi revisada em
muitas esp?cies, inclusive em rato, coelho, gato e primatas, mas nunca antes em uma
esp?cie de morcego da Am?rica do Sul. Este trabalho teve como objetivo caracterizar
os grupamentos seroton?rgicos no enc?falo do morcego Artibeus planirostris, atrav?s
de imunoistoqu?mica para serotonina. Sete morcegos machos adultos da esp?cie
Artibeus planirostris (Microchiroptera, Mammalia) foram utilizados nesse estudo. Os
animais foram anestesiados, perfundidos por via transcard?aca e tiveram seus enc?falos
removidos. Sec??es coronais do enc?falo congelado dos morcegos foram obtidos em
micr?tomo de deslizamento e submetidos a rea??o imunoistoqu?mica para 5-HT.
Delimitamos os n?cleos linear caudal (CLi), dorsal (DR), mediano (MnR), paramediano
(PMnR), pontino (PnR), magno (MgR), p?lido (RPa) e obscuro (Rob) da rafe, al?m dos
grupamentos B9 e ventrolaterais rostral e caudal (RVL/CVL). Os grupamentos
seroton?rgicos nesta esp?cie de quir?ptero apresentam morfologia e citoarquitetura
relativamente semelhante ao descrito em roedores e primatas, confirmando a
estabilidade filogen?tica desses grupamentos celulares. / Serotonin or 5-hydroxytryptamine (5-HT) is a substance found in many tissues of the
body, including the nervous system acting as a neurotransmitter. Within the neuro-axis,
the location of the majority of the 5-HT neurons is superimposed with raphe nuclei of the
brain stem, in the median line or its vicinity, so that neuronal 5-HT can be considered a
marker of the raphe nuclei. Serotonergic neurons are projected to almost all areas of the
brain. Studies show the participation of serotonin in regulating the temperature, feeding
behavior, sexual behavior, biological rhythms, sleep, locomotor function, learning,
among others. The anatomy of these groups has been revised in many species,
including mouse, rabbit, cat and primates, but never before in a bat species from South
America. This study aimed to characterize the serotonergic clusters in the brain of the
bat Artibeus planirostris through immunohistochemistry for serotonin. Seven adult bat
males of Artibeus planirostris species (Microchiroptera, Mammalia) were used in this
study. The animals were anesthetized, transcardially perfused and their brains were
removed. Coronal sections of the frozen brain of bats were obtained in sliding microtome
and subjected to immunohistochemistry for 5-HT. Delimit the caudal linear (CLi), dorsal
(DR), median (MnR), paramedian (PMnR), pontine (PNR), magnus (MgR), pallidus
(RPA) and obscurus (ROb) raphe nucleus, in addition to the groups B9 and rostral and
caudal ventrolateral (RVL/CVL). The serotonergic groups of this kind of cheiroptera
present morphology and cytoarchitecture relatively similar to that described in rodents
and primates, confirming the phylogenetic stability of these cell clusters.
|
4 |
O n?cleo supraquiasm?tico e o folheto intergenicula do do morcego (Artibeus planirostris): proje??o retiniana e caracteriza??o neuroqu?micaSantana, Nelyane Nayara Martins de 30 September 2015 (has links)
Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-05-09T19:15:53Z
No. of bitstreams: 1
NelyaneNayaraMartinsDeSantana_DISSERT.pdf: 5622573 bytes, checksum: c8393e8a0b4a684c098711fc1073bea4 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-05-09T22:05:08Z (GMT) No. of bitstreams: 1
NelyaneNayaraMartinsDeSantana_DISSERT.pdf: 5622573 bytes, checksum: c8393e8a0b4a684c098711fc1073bea4 (MD5) / Made available in DSpace on 2016-05-09T22:05:08Z (GMT). No. of bitstreams: 1
NelyaneNayaraMartinsDeSantana_DISSERT.pdf: 5622573 bytes, checksum: c8393e8a0b4a684c098711fc1073bea4 (MD5)
Previous issue date: 2015-09-30 / O sistema de temporizac?a?o circadiana (STC) compreende um conjunto de estruturas neurais, que incluem vias aferentes, como projec?o?es retinianas, que permitem a sincronizac?a?o dos ritmos biolo?gicos aos ciclos ambientais; um marcapasso central que gera o sinal circadiano e vias eferentes, que conectam o marcapasso aos efetores comportamentais. Entre os componentes centrais do STC, destaca-se o nu?cleo supraquiasma?tico (NSQ), classicamente reconhecido como a estrutural neural que rege a ritmicidade biolo?gica, e o folheto intergeniculado (FIG) do complexo geniculado lateral do ta?lamo, modulador do marcapasso. Nesse estudo, ambos os centros circadianos foram avaliados quanto a sua citoarquitetura, padra?o de inervac?a?o retiniana e conteu?do neuroqui?mco por meio da te?cnica de Nissl, de trac?ador neural e te?cnicas imuno-histoqui?micas no morcego Artibeus planirostris, microquiro?ptero comum no territo?rio brasileiro. Com base nessas te?cnicas foi possi?vel observar que o NSQ, no ni?vel rostral, exibe um formato aproximadamante triangular e no ni?vel me?dio e caudal, assume uma forma arredondada, ale?m de apresentar inervac?a?o retiniana bilateral, com leve predomina?ncia contralateral. O NSQ do Artibeus planirostris e? dotado de ce?lulas imunorreativas a vasopressina (VP), polipepti?deo intestital vasoativo (VIP), calbindina (CB) e calretinina (CR); fibras/terminiais imunorreativos a neuropepti?deo Y (NPY) e serotonina (5-HT), ale?m de marcac?a?o para protei?na aci?dica fribilar glial (GFAP). O FIG recebe projec?a?o retiniana bilateral e nos ni?veis rostral e me?dio exibe a forma de um fino folheto interposto entre o GLD e o GLV e a ni?vel caudal expande-se medialmente contornando o GLV, ale?m de conter ce?lulas que expressam NPY, CB e CR; terminais imunorreativos a 5-HT e marcac?a?o para GFAP. Esse e? o primeiro estudo a examinar o STC dessa espe?cie de quiro?ptero. Os dados indicam que o NSQ e FIG no Artibeus planirostris apresenta afere?ncias retinianas e conteu?do neuroqui?mico similar a outras espe?cies de mami?feros. / The circadian timing system (CTS) comprises a set of neural structures that include input pathways, such retinal projections, which allow the synchronization of the biological rhythms to environmental cycles; a central circadian pacemaker, which generates the circadian signal and output pathways connecting the pacemaker to the behavioral effectors. Among the major components of the STC, highlight the suprachiasmatic nucleus (SCN), classically known as the neural structure that governs biological rhythmicity, and the intergeniculate leaflet (FIG) of the thalamic lateral geniculate complex, modulator pacemaker. In this study, both circadian centers were evaluated in respect to their cytoarchiteture, pattern of the retinal innervations and chemical content with a Nissl stain, neural tracer and imunohistochemical techniques in bat Artibeus planirostris, common microchiropteran in Brazil. Based on these techniques was observed in rostral sections, the SCN had an approximately triangular shape and in middle and caudal sections, this nucleus assumed an ellipsoidal contour. It receives bilateral retinal in nervations, with discrete contralateral predominance and contains vasopressin (VP), vasoactive intestinal polypeptide (VIP), calbindin (CB) e calretinin (CR) immunoreactive cell bodies; neuropeptide Y (NPY) and serotonin (5-HT) imunopositive fibers/ terminals, besides to glial fibrillary acidic protein (GFAP) labeling. The IGL contains NPY, CB and CR immunoreactive perikarya and receives a bilateral retinal projection. The rostral and middle IGL had a leaflet shape between the DLG and VLG. At a caudal level it had a descending portions which outlines de VLG medially. This is the first report examining the CTS of these species of chiropteran. The results indicate that retinal input and chemical content of the SCN and IGL in Artibeus planirostris are similar other mammalian species. In contrast, the SCN of these bat transcend the classical organizational schemes proposed in the scientific literature. Hodological and molecular studies are needed to stablish a specific division of this structure in these species of chiropteran.
|
Page generated in 0.1154 seconds